IRWIN 3111001C Installation Kit                  Carbon hole saws for wood doors, fits all interior and exterior doors, self-centering jig fits all common door widths, adjustable for both 2-3/8 in and 2-3/4 in backsets. Includes double sided jig, two carbon hole saws, 3/8 in mandrel, bolt plate template, custom router bit and hinge plate template.